DEVELOPMENTAL ANOMALIES OF THE TEETH

Question 1

● Alteration in Shapes and Forms

A. Shape of the Crown

Answer 1

1. Germination
2. Fusion
3. Taurodontism
4. Talon’s Cusp
5. Dens Evanginatus
6. Dens Invaginatus
7. Peg shaped Lateral
8. Hunchinson’s Incisor
9. Mulberry Molar

Question 2

● Alteration in Shapes and Forms

B. Shape of the Root

Answer 2

1. Concrescence
2. Enamel Pearl
3. Dilaceration
4. Flexion
5. Ankylosis

Question 3

● Geminated teeth are anomalies which arise from an
attempt at division of a single tooth germ by an
invagination, with resultant incomplete formation of
two teeth

Answer 3

GEMINATION

Question 4

● Fused teeth arise through union of two normally
separated tooth germs

● May be either complete or incomplete

Answer 4

FUSION

Question 5

● Body of the tooth is enlarged at the expense of the
roots

Answer 5

TAURODONTISM

Question 6

● Possible clinical problems

Answer 6

○ Appearance
○ Spacing
○ Periodontal conditions

Question 7

TAURODONTISM

● Classification:

Answer 7

○ Hypotaurodont
○ Mesotaurodont
○ Hypertaurodont

Question 8

● An anomalous structure resembling an eagle’s talon,
projects lingually from the cingulum areas of a
maxillary or mandibular permanent incisor

Answer 8

TALON CUSP

Question 9

TALON CUSP

● Problems:

Answer 9

○ Esthetics
○ Caries control
○ Occlusal accommodation

Question 10

● Dens in dente, Dilated composite odontome

Answer 10

DENS INVAGINATUS

Question 10

● A developmental condition that appears clinically as an
accessory cusp or a globule of enamel on the occlusal
surface between the buccal and lingual cusp of
premolar

Answer 10

DENS EVAGINATUS

Question 11

deep invagination in the lingual pit
area, which may not be evident clinically;

Answer 11

MILD FORM

Question 12

invagination that extends nearly
to the apex of the root, and these present a
bizarre radiographic picture

Answer 12

MORE SEVERE

Question 13

● One of the common forms of localized microdontia is
that which affects the maxillary lateral incisor, a
condition that has been called

Answer 13

PEG SHAPED LATERAL

Question 14

● Enamel Hypoplasia due to Congenital Syphilis

● Present a character, almost pathognomonic,
appearance

Answer 14

HUTCHINSON’S INCISOR AND MULBERRY MOLAR

Question 15

● A form of fusion which occurs after root formation has
been completed

● Teeth are united by cementum only

Answer 15

CONCRESCENCE

Question 16

● Defined as an ectopic globule of enamel that is firmly
attached to the tooth root

Answer 16

ENAMEL PEARL

Question 16

● Thought to be due to trauma during the period in
which the tooth is forming, with the result that the
position of the calcified portion of the tooth is changed
and he remainder of the tooth is formed at an angle

Answer 16

DILACERATION

Question 17

● Teeth with a lesser bending of roots (compared to
dilaceration) which is observed in the absence of
trauma

Answer 17

FLEXION

Question 18

● Defects of Enamel and Dentin

ENAMEL

Answer 18

1. Amelogénesis Imperfecta
2. Environmental Enamel Hypoplasia
3. Localized Enamel Hypoplasia

Question 19

● Fusion between the tooth and bone

● Ensues when partial root resorption is followed by
repair with either cementum or bone that unites the
tooth root with the alveolar bone

Answer 19

ANKYLOSIS

Question 20

● Defects of Enamel and Dentin

DENTIN

Answer 20

1. Dentinogenesis Imperfecta
2. Dentin Dysplasia

Question 21

● Structural defect of the tooth enamel

Answer 21

AMELOGENESIS IMPERFECTA (AI)

Question 22

caused by reduction in the
amount of matrix protein secreted, the
clinical presentation is usually thin enamel,
surface pitting or vertical grooving

Answer 22

Hypoplastic (HP)

Question 23

characterized by the presence of normal amounts of enamel matrix that is deficiently mineralized

Answer 23

Hypocalcified (HC) and Hypomature (HM)

Question 24

● Defined as an incomplete or defective formation of the organic enamel matrix of teeth

Answer 24

ENVIRONMENTAL ENAMEL HYPOPLASIA

Question 25

Two basic types of enamel hypoplasia exist:

Answer 25

1. Hereditary type 2. A type caused by environmental factors

Question 26

ETIOLOGIC FACTORS:

Answer 26

● Nutritional deficiency (Vitamin A, C and D) ● Exanthematous disease (e.g. measles, chicken fox, scarlet fever) ● Congenital syphilis ● Hypocalcemia ● Birth injury, prematurity, Rh hemolytic disease ● Local infection or trauma ● Ingestion of chemicals (chiefly fluoride) ● Idiopathic causes

Question 27

● An autosomal dominant condition affecting both deciduous and permanent teeth

Answer 27

DENTINOGENESIS IMPERFECTA

Question 28

● Aka Opalescent dentin, Dentinogenesis Imperfecta without osteogenesis imperfecta, Opalescent teeth without osteogenesis imperfecta, Dentinogenesis imperfecta, Shields type II, Capdepont teeth

Answer 28

DENTINOGENESIS IMPERFECTA (DGI - 1)

Question 29

● Shields type III, Brandywine type dentinogenesis imperfecta

Answer 29

DENTINOGENESIS IMPERFECTA (DGI - 2)

Question 30

● Directed primary towards preventing the loss of enamel and subsequent loss of dentin through attrition

Answer 30

DENTINOGENESIS IMPERFECTA (TREATMENT)

Question 31

● Aka Rootless Teeth ● A rare disturbance of dentin formation characterized by normal enamel but atypical dentin formation with abnormal pulpal morphology

Answer 31

DENTIN DYSPLASIA